E! News has learned that the gorgeous actress is about to embark on a last-minute diet for her latest project, Cake, in Los Angeles.
She wants to look her best for the upcoming drama, says a source.
But Aniston isn't just working on her figure for the big screen…
The 45-year-old is currently planning her nuptials with her leading man—in fact, the duo spent some time sorting out the big event just last week!